Henry pattison



(Model.)

- H. PATTISON.

SHBARS.

No. 404,051. Patented May 28,A 1889.

NITED STATES PATENT OFFICE.

HENRY PATTISON, OF WINDSOR, NOVA SCOTIA, CANADA.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 404,051, dated May 28, 1889.

Application tiled Tune 26, 1888. Serial No. 278,224. (Model.) i

To a/ZZ whom it may concern.'

Be it known that l, HENRY PATTIsoN, a subject of the Queen of Great Britain, residing at Windsor, in the county of Hants, Province of Nova Scotia, Dominion of Canada, have inventedja certain new and useful Improvement in Shears, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side elevation of my improved shears; Fig. 2, a top plan view; Fig. 3, afront elevation; Fig. 4, a side elevation showing the shears in use; Figs. 5, G, and 7, elevations showing` various pieces of work designed to illustrate the use of the shears; Fig. 8, a side elevation showing the shears mounted on a bench and arranged for use with a treadle; Fig. 9, a reduced view showing a modification of the invention, and Fig. 10 a view of a piece of sheet metal cut with the shears shown in Fig. 9.

In Figs. 2, 3, and 4 the handles are represented as broken olf, in Fig. 2 a portion of the handle is shown in section, and in'Fig. 4 a piece of tin is shown in position to be cut.

Likeletters and figures of reference indicate corresponding parts in the different figures of the drawings.

lt is well known by tinsmiths, coppersmiths, and other sheet-metal workers that in the manufacture of sheet-metal vessels-such, for instance, as pans, pails, kettles, &c.ha v ing wired edges it is usual to nick the sheets to reduce the thickness of the seam Where it is turned down over the wire; but in making the nicks in the usual manner much injury is frequently done to the work on account of the shears being unprovidedwith means for rendering the cuts uniform and of proper size. This will be better understood by reference to Figs. 5 and 7 of the drawings, in which 45 and 47 represent sheets of tin, which are united by the seam 54 and provided With a wire, 65, in the usualtmanner. The sheet 45 is nicked, or has a small rectangular piece cut from its upper corner, as shown at 75, said piece being removed from the sheet by first cutting from 85 to S9, and then from 95 to 89, `r vice versa, (see Fig. 5,) two cuts being required. In performing this with shears as ordinarily constructed the workman is apt to remove a piece of such size as to greatly injure the work, as shown in Fig. 7, in which the nick 75 extends downward into the seam 54 to such an extent as to leave a large opening between the upper portions of the sheets 45 and 47 beneath the wire 65.

My invention is designed to obviate this difficulty, and also to greatly increase the capacity of the tool; and to that end I make use of means which will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A B represent the handles of the shears, which are pivoted together at m, and respectively provided with cuttingblades C D at their forward ends, hand-loops E F at their rear ends, and a spring, G, acting expansively to open the blades, these .parts being all of the ordinary form and construction, excepting as hereinafter set forth.

Projecting laterally toward the upper blade, C, from the forward end of the lower blade, D, and at right angles thereto, is an auxiliary blade, x, provided with a cutting-edge, @,Which is continuous with the main cutting-edge zof the blade D.

The forward end of the blade C is provided with an inclined cutting-edge, f, and is adapted to produce a shear out in conjunction with the auxiliary blade so, (see Fig. 3,) the edge f and main cutting-edge t of the blade C being continuous. A plate, H, provided with a slot, 14, is secured to the front side of the blade D by a setscrew, the slot enabling the plate to be adjusted in any desirable position on the blade. A stop-bar, J, is pivoted at to the upper portion of the plate H, its rear or long arm resting on a projection, l5, on the plate H, and its front or short arm projecting upward above the plane of the cutting-edge a' of the blade D.

The bar J serves as a stop against which the tin 45 is pressed when in position to be nicked, and its forward end is so formed as to stand approximately at right angles to the cutting-edge .e'pf the blade D when in position for use, as best seen in Figs. 1 and 4.

A bracket, 16, is secured to the rear side of the blade O, near its forward end, and attached to said bracket by the set-screw 17 there is a gage, K, which projects vertically below the cutting-edge?? of said blade, the

gage being provided with a slot, through which the set-screw passes, thereby rendering it adjustable on the bracket.

In the use of my improvement the stop J and gage K are iirst adjusted in accordance with the size of the nick it is desired to cut in the sheet of metal, after which the blades C D are partially closed to bring the lower end of the gage K below the plane of the cutting-edge z on the blade D, and the corner of the sheet placed in` position on the blades` D, with its edges resting against the stop J and gage K, as shown in Fig. 4, the blades being then actuated by the handles A B and the nick 75cut or formed, in a mannerlthat will be readily understood by all conversant with such matters without a more explicit description. 4

It will be obvious that the stop J and gage K enable nicks of any desired length or width to be cut in the sheet, and also that they will be exact or uniform in size when a large number of sheets are nicked in succession, thus rendering the work much more perfect when the sheets are connected by a seam and wired, as shown in Fig. G, than when produced in the ordinary manner, as shown in Fig. 7. The bar J being pivoted to the plate 1I, its forward end or short arm may be readily depressed below the plane of the cutting-edge z of the blade D, thus enabling the sheet to be placed above said bar and inserted in the jaws of the shears to a greater extent than the stop will readily permit, should occasion require it.

The upper blade, C, may be made of any desired Width at its forward end, or in accordance with the width of the nick on the line 95 to 89.

In Fig. 9 the blade .fr is provided with a ren turn-blade, 19, having a cutting-edge which is continuous with the cutting-edge u and works in conjunction with a cutting-edge on the outer side of the blade C, this form of the shears being used in cutting the recess 18. (Shown in Fig. 10.)

It vwill be obvious that the shears are equally well adapted for use by hand, as shown in Figs. 1 and 4, or by power, as shown in Fig. 8, in which M represents a bench to which they are secured, and N a treadle for actuating the blades, it being understood, of course, that when to be used by power the hand-loops E F are not necessarily required. It will also be obvious that the gravitative stop J may be in many instances used advantageously with the blade D when said blade is not'provided with the auxiliary blade Qc.

I do'not confine myself to" connecting the gage K to the blade C in any speciall manner,

or to the use of a stop on the blade D which acts gravitatively, as these features may be Varied somewhat without entirely departing from the spirit of my invention; neither doI coniine myself to mounting the pivoted bar J on the lower blade of the shears, as it may be carried by the upper blade in some instances, if desired. It may also be pivoted directly to the blade, instead of on a plate, as H, if preferred, a suitable stop or projection, as 15, being provided for it, -it being understood that when connected with the upper blade it ,istobepivoted .sothat its long or heavier arm will project past the cutting-edge of said blade, instead of its short arm.

Having thus explained my invention, what I claim is.-

1. In a shears of the character described, the combination of the following instrumentalities, to wit: a lower cutting-blade provided with a handle and with an auxiliary blade standing at an angle thereto, the cuttingedges of said blades being continuous, a stop secured to said lower blade, an upper blade provided with two continuous cutting-edges standing at angles to each other and respectively adapted to work in conjunction with t-he cutting-edges of the lower and auxiliary blades, and a gage secured to said upper blade, said handles being pivoted together, substantially as set forth.

2. In a shears, a pivoted bar, as J, carried by a blade of said shears, said bar being adapted to act gravitatively to project a portion thereof past the cutting-edge of the blade on which it is mounted, whereby it may serve as a stop for the article being cut, substantially as described.

3. A plate, as Il, provided with a slot, as 14, a b ar, as J, pivoted to said plate, and a stop, as 15, for said bar, in combination with the blade of a shears, and a screw, as g, for securing said plate to said blade, substantially as set forth. p

4. In a shears, the handle A, provided with the blade D, having the cutting-edge z, and auxiliary blade Qc, having the cutting-edge lv,

' said cutting-edges being continuous, the handle B, provided with the blade C, having the cutting-edge t and inclined cutting-edge f, said cutting-edges being continuous, the gage K, adjustably mounted on the blade C, the pivoted bar J, adjustably mounted on the blade D,and a stop for said bar, said handles being pivotally connected, and all being coinbined andarranged to operate substantially as described. p

HENRY PATTISON. Witnesses:

C. B. NicoLsoN, GEO. PArTIsoN, W. M. OHRIsTIE.

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